Aldehyde condensation products of fluoroaliphatic phenols

ABSTRACT

Condensation products of aldehydes and fluoroaliphatic phenols are substantive to wool, synthetic polyamides, leather and skin, the compositions preferably being extended with a suitable pharmaceutical medium. The condensation products are useful for the preparation of compositions that render such materials oil and water repellent.

United States Patent [191 Endres et a1.

[ 1 Aug. 27, 1974 ALDEHYDE CONDENSATION PRODUCTS OF FLUOROALIPHATIC PHENOLS Inventors: Leland S. Endres, 1351 Femwood Dr., San Luis Obispo, Calif. 93401; Leo F. Gehlhoff; Dallas D. Zimmerman, both of 3M Center, Saint Paul, Minn. 55101 Filed: on. 29, 1970 Appl. No.: 85,278

US. Cl.-..... 260/619 A, 260/619 R, 260/613 R,

I References Cited UNITED STATES PATENTS 8/1936 Honel et a1. 260/619 R 2,730,554 l/l956 Schetty et al. 260/619 A 2,734,088 2/1956 Knowles et al. 260/619 A 3,151,096 9/1964 Kordzinski et a1 260/619 R 3,326,928 6/1967 Mattson 260/623 R X Primary Examine r-Bemard Helfin Attorney, Agent, or Firm-Kinney, Alexander, Sell, Steldt & DeLaHunt ABSTRACT Condensation products of aldehydes and fluoroaliphatic phenols are substantive to wool, synthetic polyamides, leather and skin, the compositions preferably being extended with a suitable pharmaceutical medium. The condensation products are useful for the preparation of compositions that render such materi-- als oil and water repellent.

14 Claims, N0 Drawings ALDEHYDE CONDENSATION PRODUCTS OF FLUOROALIPHATIC PHENOLS BACKGROUND OF THE INVENTION The present invention relates to improved compositions and methods that render the skin repellent to oil and water and more particularly to certain novel compositions adapted to topical application to provide the skin with protection which is not readily removed by mild abrasion or hot detergent solutions.

It has long been known that the skin can be protected by the application of lotions, creams, and various other emollient compositions. These preparations are intended to exert a beautifying, softening and lubricating effect on the skin and may even contain medicinal ingredients. Other compositions have been described which will prevent absorption of harmful or cosmetically undesirable substances. However, the preparations heretofore known for the purpose described, while effective to some degree, have all suffered from certain disadvantages. Mere emollients fail to protect the skin from exposure to injurious materials and only serve as palliative remedies afterwards. Barrier creams have been useful for certain specific conditions, but heretofore have failed to have broad general applicability. Furthermore, in maintaining personal hygiene, for example, by washing the hands, these compositions of the prior art are largely removed and repeated applications of the compositions are necessary. Obviously, the benefits obtained from these applications are not lasting since the protection is readily removed.

To provide skin protective compositions that resist removal from the skin by washing, particular ingredients have been incorporated into various compositions. For example, US. Pat. No. 2,727,846 teaches the incorporation of siloxanes into skin protective compositions. Such compositions, however, are easily transferred from the hands by touch or slight abrasion with other materials. This is a serious drawback in that even traces of such substances may bring about contamination of any surface touched. It is well known that the presence of even traces of silicones interfere with the action of adhesives, paints, and protective coatings. Furthermore, to be effective on the skin, a coating of a siloxane must be applied which is virtually continuous. Such a coating adversely impairs access of air and transpiration of moisture which is needed for the wellbeing of the skin.

To overcome the disadvantages of siloxanecontaining skin protective compositions, it is proposed in US. Pat. No. 3,100,180 that the siloxane be replaced by a minor amount of a fluorocarbon elastomer. In US. Pat. No. 3,470,292, it is proposed that the disadvantage of siloxane in skin protective compositions be overcome by incorporating a phosphatide such as lecithin, kephalin, and sphingomyelin. At present there is no known effective composition which adequately protects the skin from water and oil known to applicants.

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for protecting the skin against injurious and undesirable materials such as hydrous and oily materials. More particularly, there is provided compositions for the prevention of dish-pan hands that is caused by repeated immersion of the hands in hot water containing soap or detergents. Still more particularly, skin protective compositions are provided which are substantive to human and animal skin and that, by reason of this substantivity, afford long lasting protection of the skin to water and oil. The skin protection compositions of the present invention are adapted to topical application, are resistant to abrasion, and may include medicarnents.

In accordance with the present invention, the skin is made both oleophobic and also resistant to aqueous materials, including acids and bases and also protected from irritating and otherwise undesirable substances, by applying thereto compositions comprising certain aldehyde condensation products of certain fluoroaliphatic phenols in suitable pharmaceutical media as hereinafter defined. The compositions of the invention provide a long-lasting, indiscernible coating on the skin which is substantively bound to the skin and is not readily washed or abraded from the skin as are other topical protective preparations described heretofore. Although extremely effective in its protective action, the coating apparently does not affect the transpiration of the skin. The term, substantive as used herein, means that the material has a high degree of tenacity for the skin and is essentially nonremovable by normal procedures. It is believed, though applicants do not intend to be bound thereby, that the compositions of the present invention are actually chemically bound to the skin at least to some extent.

Broadly speaking, compositions useful for the purpose of the invention are provided by incorporating a minor amount of aldehyde condensation product of a fluoroaliphatic phenol into a major amount of an aqueous pharmaceutically acceptable extending medium of the aqueous emulsion type which may also contain a thixotropic bodying agent or thickening agent. Preferably there is employed from about 0.3 to about 20 percent by weight of the condensation product. The term pharmaceutical extending medium as used herein includes such preparations as the bases for lotions, creams, ointments, and the like water-based preparations for topical application, which are sufficiently bodied so that the resultant composition is not watery or thin, but without limiting the viscosity or composition solely to a single type of preparation. For the purpose of the invention, the viscosity of the products described and claimed herein is required to be less than 1,000 centipoises when stirred at about 60 rpm. and may range upwardly to 1,000-5,000 centipoises, when determined using a Brookfield viscometer at about 25 C. The physical appearance of such preparations for topical application may range from that of a lotion through that of a flowable jelly, i.e., fairly stiff but flowable under mechanical force.

The aldehyde condensation products of certain fluoroaliphatic phenols that are disclosed herein are the significant and critical ingredient of the compositions of this invention. These condensation products are formed by the catalyzed reaction of an aldehyde with certain fluoroaliphatic phenols. The substantivity of these condensation products to human and animal skin and to other proteinaceous surfaces is believed to be obtained by reason of the phenolic hydroxyl group present in the condensation product. The oil and water repellent character is obtained by reason of the fluoroaliphatic group. Compounds possessing fluoroali- RCHO wherein R is hydrogen or an organic radical having not more than seven carbon atoms, and which may be substituted by methyl, methoxy, ethyl, or ethoxy groups. More preferably, R is a lower alkyl group of the class C,,H where n is an integer of from 1 to 4. The aldehyde may be introduced into the reaction mixture either as a monomeric material or as the equivalent polymeric material which is convertible under condensation conditions to monomeric aldehyde. Suitable aldehydes (and materials capable of forming aldehydes) include acctaldchydc henzaldchydc hutyraldehyde furfuraldchyde glutaraldchydc glyoxal paraformaldchydc paraldehydc propionuldchydc tctruhydrofurfuraldchydc trioxanc isohutyrnldchydc The preferred aldehyde is formaldehyde.

For purposes of this invention, a fluoroaliphatic phenol is a compound that may be represented by the general formula in which I, m, p, and r are each integers of l or 2; t is O or 1; H is a hydrogen atom that is sufficiently reactive to undergo a catalyzed condensation reaction with an aldehyde; A is an aryl nucleus of about six to carbon atoms; OH is a phenolic hydroxyl group; R; is a monovalent fluorinated saturated non-aromatic aliphatic radical and Q is a divalent group linking A to R,.

Examples of A include aromatic nuclei such as benzene, naphthalene, diphenyl and diphenylmethane and their alkyl, aryl, alkoxy, aryloxy, and halo derivatives.

Examples of (2 include the following and combinations thereof:

In the above examples n is an integer from 1 to 15 and designates the number of carbon atoms in the alkylene or haloalkylene radical joining the R; group to the aryl group.

The fluoroaliphatic radical (R,) is a monovalent fluorinated saturated non-aromatic aliphatic radical having at least three carbon atoms in the skeletal chain. This chain may be straight, branched or cyclic, and may be interrupted by divalent oxygen atoms or trivalent nitrogen atoms bonded only to carbon atoms. Preferably the chain does not contain more than one nitrogen atom or one oxygen atom for every two carbon atoms in the skeletal chain. A perfluoroalkyl radical is preferred, but an occasional hydrogen or chlorine atom may be present as substituents in the fluorinated aliphatic radical provided that not more than one such non-fluorine substituent is present in such radical for every two carbon atoms, and that such radical contains a tenninal perfluoroalkyl group. Terminal in this connection refers to the position in the skeletal chain of the radical which is furthest removed from the group. Preferably, such a radical contains not more than a total of 20 carbon atoms whether r is l or 2 since such a large radical results in inefficient use of the fluorine content.

Examples of fluoroaliphatic phenols suitable for the preparation of the aldehyde condensation products of the present invention are shown in Table l below.

EO-CaFn CaFn (JO-CaFn (ill CH1CH-CHr-CaFn TABLE IContin ued @osmwmw O O-CnFzs OH OH aoFn AB E ont ue CHr-CHrCaFm CHz-CHa-CHz-CsFn O m ZQ 9 l CH-CHz-CioFaa CHr-CHr-CHrCw aa OH F2 F Cl F l CHr-CH-OH The examples of phenols shown in Table I that may of perfluoroalkyl carbonyl chlorides, Ahlbrecht and Husted, US. Pat. No. 2,617,817 and phenols in a manner similar to that given in Beilstein, Organische Chemie, Vol. Vlll, p. 102 (1925). The perfluoroalkyl sulfonamides may be prepared by the reaction of the perfluoroalkyl sulfonyl chloride or bromide with corresponding aminophenol in accordance with procedures given in Brice and Trott, US. Pat. No. 2,732,398.

The phenols of Table I where t is in the general formula of fluoroaliphatic phenols as heretofore described may be prepared according to the process given in Mattson, U.S. Pat. No. 3,326,928.

The pharmaceutical extending medium in the preferred embodiment of the present invention, consists essentially of an aqueous base which may contain thixotropic bodying agents or thickeners. In addition to water, the aqueous base may comprise alcohol or other solvents in amounts up to a few percent, usually not more than about percent by volume. The preferred bodying agent for the oil and water repellent composition of the invention is cetyl alcohol.

The pharmaceutical extending medium consists of all the various ingredients and adjuvants employed as a base except for the formaldehyde condensation product of certain perfluoroalkyl phenols which are added as an alcoholic solution or aqueous dispersion.

Illustrative of the types of materials which can be incorporated optionally in desired amounts for particular purposes are humectants, therapeutic ingredients, perfumes and colorants.

The catalysts which may be used in the present invention are acid or base catalysts. Strong acids, such as sulfonic acids (sulfuric acid) or weak acids such as halogenated aliphatic acids (acetic acid) may be used to prepare novolaks. Preferred acids are trichloroacetic and para-toluene sulfonic acids. Of the many alkaline catalysts which may be used to prepare resoles, sodium hydroxide is preferred. Other catalysts include bases such as the hydroxide oxides and carbonates of lithium, sodium, potassium, cesium, magnesium, calcium, strontium, and barium and zinc oxide. Still other catalysts include ammonia, trimethyl amine, triethyanolamine, and pyridine. The resins obtained from the base catalyzed condensations are called resoles.

As with most phenol aldehyde condensation reactions the character of the product obtained is very dependent on component reactivity, concentration and reaction conditions. It is thus difficult to control the reaction in small scale preparations. In general, the efiectiveness of acid catalysts decreases as follows: hydrochloric, nitric, sulfuric, trichloroacetic, oxalic, phosphoric, dichloroacetic, chloroacetic, formic, lactic, and acetic. Also, the more reactive the phenol and aldehyde, the higher the molecular weight and hardness of the novolak obtained.

For the purposes of this invention, desirable condensation products are prepared using mole ratios of fluoroaliphatic phenol to aldehyde of from l.1:0.3 to 1023.5 or more. The preferred fluoroaliphatic phenol to aldehyde ratios are 10:06 to 1.0: 1.3. Reaction temperatures that may be used are from about 40 C. to about 150 C. or higher and the preferred reaction temperatures are from about 80 C. to about 1 10 C.

Desirable condensation products that possess oleophobic and hydrophobic properties are obtained when the perfluoroalkyl group of the phenol contains at least three carbon atoms up to more than 20 or more carbon atoms. The preferred perfluoroalkyl groups are those containing from about six to about 10 carbon atoms.

The lower molecular weight condensation products, in general, are soft waxes having a buttery consistency. The novolaks prepared from 2-(2'-chlor0-3'- perfluorooctyl)-n-propyl phenol and formaldehyde having an average molecular weight of about 800 to about 1,500 are soft probably because they are not a precise reaction product but are mixtures of reaction products including unreacted phenol, phenol reacted with one or more aldehyde molecules, two phenol moieties reacted with one or more aldehydes, etc. It is these products that possess the greatest amount of substantivity to skin, leather, wool and polyamide surfaces. The higher molecular weight condensation products; i.e., those with molecular weights over about 1,500. are hard, waxy solids and are useful in the preparation of oil and water repellent waxes and polishes. Other uses include coatings and molded products that have water and oil repellency and each release surfaces. Both the lower and higher molecular weight condensation products are useful as a prepolymer to be extended with epoxy groups containing compounds and resins.

The molecular weight range of the soft waxy novolaks will, of course, vary depending upon the nature of the fluoroaliphatic phenol, the aldehyde, the catalyst, the reaction temperature and the like. The use of a strong catalyst reduces the time and temperature required to prepare the product and visa versa.

The method for preparing the novel condensation products of the present invention comprises, generally, the steps of reacting a fluoroaliphatic phenol having the formula )l )m[( )t( f)P]r as defined above with an aldehyde having the formula RCHO as defined above in the presence of a condensation catalyst at a temperature of from about l/2 to 8 hours at a temperature of from about 50 to 150 C.

The present invention will be more clearly understood with reference to the following non-limiting examples wherein all parts are by weight unless otherwise specified.

EXAMPLE 1 Preparation of 2-(2-chloro-3-perfluorooctyl)-npropyl phenol A 2-liter three-neck flask equipped with a mechanical stirrer, a sparger tube and means for absorbing sulfur dioxide, and means for heating the flask, was charged with 225.6 grams of 2-a11ylphenyl acetate (1.45 moles) and heated to C. When the temperature reached 120 C., there was added 0.2 grams of benzoyl peroxide and, over a period of 2 hours, 755 grams (1.45 moles) of perfluorooctane sulfonyl chloride (b.p. 194 C.; n,, 1.3200) was added while maintaining the temperature at 120 to C. To maintain a concentration of free radicals in the reaction mixture, there was added periodically during the 2 hours small portions of additional benzoyl peroxide (a total of 1.0 grams including the initial 0.2 grams were added). The mixture was heated at 120 an additional 30 minutes after the addition was complete. Then, without cooling, the flask was rigged for vacuum distillation. Vacuum was applied cautiously to avoid foaming and the mixture distilled. There was obtained 729.2 grams of 2-(2' chl0ro-3'-perfluorooctyl-n-propyl) phenyl acetate (79.7 percent conversion) b.p. 140 C./0.40 mm. and

unreacted o-allylphenyl acetate. This compound is the precursor for the corresponding phenol.

Into a lO-liter flask equipped with a 2-foot diltillation column and fractionation take-off head and means for heating the flask was placed 729.2 grams (1.16 moles) of 2-(2'-chloro-3-perfluorooctyl)-n-propyl phenyl acetatc, 7 liters of absolute alcohol and 1.0 gram of ptoluene sulftmic acid. The mixture was heated to reflux and over a period of 8 hours after which 4 liters of ethanol were removed by distillation. Of samples taken from the flask during this time, there was an indication of a continued decrease in acetate group contant as determined by infrared analysis. Distillation was continued to remove the remaining ethanol. The residue in the flask was purified by absorption on silica gel and elution with an 80:20 benzenezhexane solution. After removal of the solvent by distillation, taking care not to overheat the product, 637.9 grams of 2-(2-chloro-3'- perfluorooctyU-n-propyl phenol was obtained (99.5 percent of the theoretical amount). Melting point 6973 C. Analysis: Calculated for C H CIF O; C, 34.7%; H, 1.7%; l, 0.7%; F, 54.9%. Found; C, 34.6%; H, O; 1, 1.79%; F, 54.8%. The above reactions are believed to be properly represented as follows:

O-CO-CH:

B2202 CHzCH=CH2 ClSOz-CaFn CHz-CHCl-CHg-CsFn EXAMPLE 2 By performing the procedures of Example 1, using in place of 2-allylphenyl acetate an isomeric mixture of 3- and -chloro-2-allyl phenyl acetates, the isomeric mixture of 3- and 5-chloro-2-(2-chloro-3-perfluorooctyl)-n-propyl phenyl acetate (b.p. 153 C./0.6 mm.)

was prepared from which the isomeric mixture of 3- and 5 -chloro-2-( 2 -chloro-3 -perfluorooctyl )-n-propyl phenols (yellow wax-like material) may be prepared. Analysis: Calculated for C H CI F O; C, 32.8%; H. 1.4%; F, 51.8%. Found; C, 33.2%; H, 1.6%; F. 51.8%.

EXAMPLE 3 EXAMPLE 4 Additional w-perfluoroalkyl-propyl phenyl acetate and the phenols may be prepared therefrom, are given in Table II.

TABLE 11 Corresponding w-PerfluoroalkyLPropyl Acetate w-Perfluoroalkyl-Propyl Phenol I 4-chloro-2-(2-chloro-3'-perfluorooctyl )-n-propyl phenol (m.p. 88-93 C.)

3,4,6-trichloro-2-(2'-chl0ro- 3-perfluoro-octyl)-n-propyl phenyl acetate (b.p. 147C/ 0.07 mm) The w-perfluoroalkyl-propyl acetates of Table ll were prepared from 4-chloro-2-allyl-phenyl acetate, 3,4,6-trichloro-2-allyl-phenyl acetate, 2,6-dichloro-2- allyl acetate, and an isomeric mixture of 2,4- and 2,6- diacetoxy-allyl-phenyl acetate respectively.

EXAMPLE 5 Table 111 gives the structure of yet another alkenylphenyl acetates that may be used to prepare additional Wperfluoroalkyl-phenols of this invention. These compounds also may be prepared by following the processes of Example 1 using appropriate properties of W- perfluoro-alkyl sulfonyl halide and alkenyl phenyl acetate.

Same as above CaFiaSOuUl ()11 The alkenyl-phenyl acetates of Table HI and those used in Examples 1 and 2 are prepared from the alkenyl-phenyl ethers which in turn are prepared from the phenols and alkenyl bromides. These reactions are well 65 hydroxide, to form a w-perfluoroalkyl alkenyl phenol known procedures. See: J. Am. Chem. Soc., 72, 839-41 (1950); J. Org. Chem. 19, 726-32 (1956); J.

Chem. Soc., Japan 57. 599-602 (1956).

in Example 6.

- rine in the alkyl side chain of the w-perfluoroalkyl chloroalkyl phenol. The chlorine is readily removed by dehydrogenation with a base such as for example, sodium and this compound can be hydrogenated to give the corresponding w-perfluoroalkyl alkyl phenol. Also, w-perfluoroalkyl alkyl phenols may be prepared by performing the dehydrochlorination and hydrogenation as EXAMPLE6.

An electrically heated rocking autoclave of 250 ml. capacity was Charged with 30 grams of 4-methyl-2-(2'- chloro-3 '-perflnoro0ctyl)-n-propyl phenol (0.05 moles), 8.0 grams of potassium hydroxide, 10 ml. of water, 60 ml. of absolute alcohol and 6.0 grams of Raney nickel catalyst. Hydrogen was introduced at 3,000 p.s.a. pressure and the autoclave was rocked for 4 hours while heating at 150 C. At the end of 4 hours the autoclave was cooled to about 50 C., flushed with nitrogen and opened. The contents were removed and cautiously filtered hot (avoiding spontaneous ignition of the catalyst by keeping it wet at all times), and the catalyst was washed with several 50 ml. portions of hot ethanol. The combined filtrate and washings were stirred into about 250 ml. of water and acidified with dilute hydrochloric acid. The oily layer was separated and purified by absorption on silica gel in a column and elution with a benzene/hexane solvent. After vacuum distillation of the solvent there was obtained about 28 grams of 4-methyl-2-( 3-perfluorooctyl)-n-propyl phenol.

In like manner other w-perfluoroalkyl-alkyl phenols may be prepared from the corresponding w-perfluoroalkyl-chloroalkyl-alkyl phenols, including those given in Table III.

The aldehyde condensation products of this invention may be prepared by the reaction of the perfluoroalkyl phenols disclosed above with aldehydes by well known procedures and in accordance with the following examples.

EXAMPLE 7 Into a 500-ml. three-neck resin flask equipped with mechanical stirrer, reflux column and thermometer, was placed 100 ml. toluene, 294.3 grams (0.50 moles.) of 2-(2-chloro-3'-perfluorooctyl)-n-propyl phenol, 15.0 grams (0.50 moles) of paraformaldehyde and 30 grams of trichloroacetic acid. The mixture was stirred and heated at 80 to 85 C. for 3 hours and then at reflux (1 10 C.) for an additional 2 hours. The solution was cooled to about 50 C., 40 ml. of cone. aqueous ammonia was added, and heat applied to reflux the mixture for an additional hour. The reaction mixture was cooled, washed several times with an equal volume of water, and the solvent removed by vacuum distillation taking care to avoid foaming as the material becomes concentrated.

The condensation product, a novolak, as made in the quantity of this example has a molecular weight by vapor phase osmometry of 1,0003] 00. It is a light yellow soft butter-like wax useful for the preparation of compositions having value in the treatment of skin and render it repellent to oil and water.

EXAMPLE 8 Example 7 was repeated with the exception that 0.05 grams of p-toluenesulfonic acid was used as the condensation catalyst in place of 30 grams of trichloroacetic acid. A novolak was obtained that had a molecular weight by vapor phase osmometry of 1,650. It was a tan-colored hard Wax.

EXAMPLE 9 Into a 500 ml. three-neck resin flask equipped with a mechanical stirrer, reflux condenser and thermometer were placed 294.3 grams (0.50 moles) of 2-(2- chloro, 3'-perfluorooctyl)-n-propyl phenol and grams of formaldehyde (30% solution) (0.55 moles). The mixture was stirred and heated to C. and made alkaline to phenolphthalein by dropwise addition of 20 percent sodium hydroxide in water. The mixture was then heated to C. and stirred at thistemperature for 4 hours. After this time, the mixture was cooled to 60 C. and acidified (pH: 6.0) with dilute phosphoric acid. The layers were allowed to separate and the yellow viscous lower layer removed from the flask. After drying in vacuum, a waxy yellow resin was obtained. This material is a resol and useful in further condensations to useful polymeric material. It is also useful for the preparation of protective compositions for the treatment of skin and leather.

EXAMPLE 10 Table IV presents the repellcncy and substantive properties of a number of fluoroaliphatic phenols and condensation products. It may be observed that. in general, monophenols and compounds with more than one OH per carbocyclic ring exhibit only fair oil and detergent repellency on pigskin and are of less substantivity, i.e., little oil and detergent repellency remains after a detergent wash. Fluoroaliphatic phenol aldehyde condensation products having an average molecular weight of about 900 to about 1,600 show good oil and water repellency on pigskin which is very similar to human skin and has the same properties for purposes of testing repellency. They also are substantive to the pigskin as is indicated by the fact that pigskins treated with these condensation products maintain their repellency after a l-hour wash in a hot detergent solution.

TABLE IV Properties of fluoroaliphatic phenols and condensation products Formaldehyde Molec- Repellency B (condensation ular Substan- Fluoroaliphatic phenol catalyst) weight b Water Oil tivity 1 OH None 590 Fair None None.

CH:CHC1CH2 CBF 11 2 OH do. 603 ..do do Do.

TABLE IV Continued Properties of fluoroaliphatic phenols and condensation products Formaldehyde Molec- Rcpcllcncy" Suhslzur (condensation ulnl livily" Fluoroaliphatic phenol catalyst) weight" Water ()il a 011 do.- 024 ;.do do.. Do.

Cll2CllCl-(|)ll2 CaFn 4 0H do. 693 do do D0.

01 CH2CHCI(T,H2

Cs n CI I Cl 5 (I)H do. 606 do Fair..." D0.

CH2CHC1?H2 CsFn OH 6 OH do. 622 do ..do D0.

CHz-CHCl-CHz (JaFn HO OH 7 OH do. 630 None- Good..- D0.

o zCaFn 8 (I)H do. 624 Fa1r- None.-.. D0.

CsFn Hz-CHCl-(BHz 9 OH (H1 300 -do ..-db;---. Do.

CHzCHCl-CHz plus novolac of aFn 10 0H CHQO c 1,100 Good..- Good... Good.

CHg-CHCl-CH:

aFn

11 Same asabove CHzO d 14 OH 980 do ..do.. Fair.

CHzCHOl-(|3Hz CsFn 15 0H CHzO 1,150 ..(1D do. Do.

TABLE lV-Continued Properties of fluoroaliphatic phenols and condensation products Formaldehyde Molec- Repellency (condensation ular Substan- Fluoroaliphatic phenol catalyst) weight" Water Oil tivity 16 OH H 1,218 do Good.

GHz-CHCE-CH CH CH2CHCICH2 s iv CaFn CH3 CH3 17 OH C 20 3,000 Fair.. Fair"... Poor.

CHz-CHCl-CHZ CnFn Properties of fluoroaliphatic phenols and condensation products:

A Test on the phenol before reaction with aldehyde. b Molecular weight determined by vapor phase osmometry. e Condensation catalyst is trichloroacetic acid. 4 Condensation catalyst is p-toluenesulfonic acid. e Test on the dihydroxy-diphenyl methane. 1 Molecular weight of the non-perfluorinsted novolac.

If the perfluorooctyl group of the compounds and products of Table IV are replaced by other perfluoro groups including perfluorobutyl, perfluoroamyl, perfluorohexyl, perfluorododecyl, perfluoroodecyl, and other perfluoroalkyl groups, corresponding compounds and products are obtained that have properties similar to those listed in Table IV.

If the formaldehyde used in the condensation products of Table IV is replaced by other aldehydes including acetaldehyde, benzaldehyde, butyraldehyde, furfuraldehyde, glutaraldehyde, glyoxal, paraldehyde, propionaldehyde, tetrahydrofurfuraldehyde, and other aldehydes desirable condensation products are also obtained that have properties similar to those listed in Table IV.

The following example demonstrates a preferred application of the condensation products of this invention in a composition that provides effective protection of the skin against aqueous and oily material that otherwise might'injure the skin.

EXAMPLE 1 1 To prepare a perfumed protective handcream, an aqueous solution of 82.35 parts of water, 0.3 parts of ammonium lauryl sulfate, and 0. 15 parts of Tegosept M (methyl ester of p-hydroxybenzoic acid, a water soluble bactericide) was heated to 50 C. and added to a high shear mixer (I-lomomixer). An oil phase solution of 3.0 parts of cetyl alcohol, 4.0 parts of the novolak of 2-(2'- chloro-3'-perfluorooctyl)-n-propyl phenol (prepared as described in Example 7), 0.10 parts of Tegosept P (propyl ester of p-hydroxybenzoic acid, an oil soluble bactericide) and 0.004 parts of propyl gallate (antioxidant) was also heated to 50 C. was slowly added to the aqueous mixture, the entire mixture was thoroughly mixed and while mixing, cooled to 32 C., then 0.10 parts of perfume Flueroma Fragrance No. 9006 available from U.O.P. Fragrances Division of Universal Oil Products, Inc., New York, was added. After the creamy emulsion is cooled to below about C. while mixing, it is discharged from the mixer.

The emulsion was then rubbed onto the hands in the usual manner and was found to be protective against water, oil and detergents.

Handcreams with similar desirable properties may be prepared by using in accordance with Example 1 1 from B After application of an 8% solution to raw pigskin that had been extracted with tetrahydroiurane, dried, and rehydrated to a flexible condition.

* Repellency of treated pigskin after it has been given a 1-hour wash guis s-605% aqueous solution of sodium dodecylbenzene sulionatd a 0.5 to 4 parts of cetyl alcohol per parts of handcream. Less cetyl alcohol than 0.5 parts gives thin unstable emulsions and more than 4 parts of cetyl alcohol reduces the oil repellency of the handcream. Likewise,

the preferred concentration of perfume or fragrance depends on the type of fragrance used. In general, a useful concentration is from about 0.05 parts up to 0.15 parts per 100 parts of handcream. Less than 0.05 parts of fragrance is ineffective and more than 0.l5 may reduce the oil repellency of the handcream. Also, handcreams with desirable properties may be prepared by using in accordance with Example 4 from 0.2 to about 0.4 parts of ammonium lauryl sulfate.

The cream of Example 1 l was the result of the study of many formulations to find composites that do not have components that interfere with the substantivity of condensation products of the invention. In general, inorganic thickeners, fugitive surfactants, fluorochemical surfactants, fatty acids, most common surfactants and most fatty alcohols are to be avoided because rather large quantities of these materials are required to achieve emulsion stability. At the high concentration of these materials required the substantivity and repellency of the condensation products of this invention are reduced.

EXAMPLE 12 A protective lotion was prepared by dissolving 0.004 parts of propyl gallate, 4 parts of the novolak of 2-(2- chloro-3-perfluorooctyl)-n-propyl phenol (prepared as in Example 1) and 0.1 part of perfume in 96 parts of denatured ethyl alcohol. The resulting lotion provided protection of the hands against hot soapy water. When applied to the hands and other parts of the body, the cream provided protection against aqueous and oily solutions. In place of denatured ethyl alcohol, isopropanol or a Freon or a mixture of one of more Freons having a boiling point of about 70 F. to about F. may be used. If the lotion is to be used to treat leather, textiles, or synthetic materials, then other solvents may be used including diethyl ether, acetone, methyl ethyl ketone, amyl acetate, benzene, chlorinated hydrocarbons and the like.

EXAMPLE 13 The repellency and substantive properties of the protective compositions of this invention were determined by photographically measuring droplet contact angles wherein l, m and r are l or 2, t is -1; H is a hydrogen over a five minute period. Pigskin or callus tissue was atom sufficiently reactive to undergo a catalyzed contreated with the test formulation as prepared in Examdensation reaction with an aldehyde; A is an aryl nuple l l, permitted to dry after which a droplet of soap cleus containing from six to 15 carbon atoms; OH is a solution (0.5 percent sodium lauryl sulfonate in deionphenolic hydroxyl group; R, is a monovalent fluoriized water) or oil (75 percent mineraloil of 310 to 320 nated saturated aliphatic radical containing from three Saybolt-seconds in heptane) was placed on the surface to 20 carbon atoms and Q is an alkylene chain containfrom a syringe. Pictures taken level with the treated ing from one to carbon atoms and optionally modisurface at times of 0, 15 30, 60 and 300 seconds w r fied by halogen, ethylenic unsaturation and oxa oxygen d t det i the w tti rates f th t i l 10 and a saturated aliphatic aldehyde containing not more i it I i i l Contact angle as as rate f Change than seven carbon atoms in addition to the aldehyde of contact angles were used to compare repellencies of Carbon atom or benzfildehydeformulations. Substantivity is measured by determining A condensation P y of Claim 1 0f formaldethe contact angle of the mineral oil-heptane mixture on y and "P y the treated callus tissue or pigskin after it is subjected 5 p pylph n wherein the perfluoroalkyl group is a to a 40 minute wash with a 0,5 percent l ti f monovalent radical containing from three to carbon dium lauryl sulfonate at 45 C., rinsed with warm water atoms.

and dried. 3. The polymer of claim 2 wherein the phenol is 2- lt may be seen by inspection of Table V that the (2-chloro-3-perfluorooctyl)-n-propylphenol. creams and lotions made using novolaks of 2-2(2'- 20 4. A polymer according to claim l'wherein Q is a chloro-3-perfluorooctyl)-n-propyl phenol exhibit oil monochloro-substituted alkylene chain.

and soap repellency and that this condensation product 5. A polymer according to claim 4 wherein Q is is substantive to callus tissue. These results are indi- -CH CHC1CH Cated y the high Contact angle 9 drops of Oil on 6. A polymer according to claim 5 wherein the phetreated callus tissue after it has been washed in hot dei 2-(2' h] -3-perflu r 0ctyl)-n-pr0pyl phenol. tergent solution. Creams and lotions made with other novolaks and aldehyde condensation products having 7, A polymer according t lai 1 wherein the phean average molecular weight of from about 900 to 1 is 2 rfl t l phenoh about 1600 in accordance with the teaching of this ing A polymer according to claim 5 wherein e vention are repellent to aqueous and oily substances 1 is an isomeric mixture f 3- and 5 1 2 2' and are substantive to skin and proteinaceous materlhl 3' fl t l phenol. als.

TABLE V Repellency Tests on Callus Tissue, droplet contact angle Before detergent wash After detergent wash Preparation' Preparation Preparation Preparation Untreated of Ex. 11 of Ex. 12 Untreated of Ex. 11 Ex. 12 Elapsed time, seconds Oil Soap Oil Soap Oil Soap Oil Oil 7 Oil 1 Wets out almost immediately. W W

MP 14 9. A polymer according to claim 1 wherein Q is -CH Cl-l CH 10. A polymer according to claim 1 wherein A is a benzene ring. 7 11. A polymer according to 'claim 10 wherein the phenol has the formula An aerosol spray embodying the compositions of the invention is prepared by charging a 6 ounce aerosol can with 90 grams of a 4 percent solution of the novolak of 2-(2'-chloro-3' perfluorooctyl)-n-propyl phenol (prepared as in Example 7) in ethanol and 90 grams of a 40:60 mixture of Freon l l and Freon 12. To disperse the protective composition, the aerosol can is equipped (1)11 with a Precision" valve and dip tube. When sprayed on the hands or other parts of the body, a pleasant emollient character is noted and the hands and body are afforded protection against oil and aqueous based irritants, acid and basic solutions even after the hands and body are washed in water or detergent solutions. wherem the groups are Selected from hydrogen methyl provided that not more than one of the R What is claimed is: groups methyl 1. A condensation polymer having an average molec- A polymer accordmg to Clam 11 wherem Rf a ular weight of about 800 to about 1,500 of the condenperfluomoctyl group sraltltlilzn catalyst catalyzed reaction of a phenol of the foryg: gt zi gglzgiggz i to Claim 1 wherein the alde- 14. A condensation polymer having an average molecular weight of about 900 to about 2,500of the condensation catalyst catalyzed reaction of a phenol of the 9P formula 55 CIhClIGlCllaRr HIM-mini],

wherein I, m and r are l or 2, t is 0-l; H is a hydrogen atom sufficiently reactive to undergo a catalyzed condensation reaction with an aldehyde; A is an aryl nucleus containing from six to carbon atoms; OH is a phenolic hydroxyl group; R; is a monovalent fluori- UNITED STATES PATENT OFFICE Page 1 CERTIFICATE OF CORRECTION Patent No. 3 32 H4 9 Dated Aunust 27 197 4 Inventor(s) Leland S Endres Leo F. Gehlhoff Dallas D. Zimmerman It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

First page, first column, after "Saint Paul, Minn. 55101" add assignors to Minnesota Mining and Manufacturing Company, St. Paul, Minn.--

Column 8, line 18, replace "each" with -easy- Column 10, line 36, add the following:

--2,6-dich1oro-2-(2'-chloro-3'- 2,6-dichloro-2-(2'-ch1oroperfluorooctyl)-npropyl phenyl 3-perfluorooctyl)-n-propyl acetate {b.p. l60C/0.05 mm) phenol (m.p. 88-89 C.)

Isomeric mixture of 2, and Isomeric mixture of 2, and 2,6-diacetoxyl (2'ch1oro- 2,6-dihydroxy-l-(2'-chloro 3'-perfluorooctyl)n-propyl 3'perfluorooctyl-npropyl benzene (b.p. l70C/0.l mm) benzene-- F ORM PC4050 (10-69) USCOMM-DC GOS'IO-PSD r 11.5. covnmlzur um'mm orrlc! "OI o-su-au,

"UNITED STATES PATENT OFFICE Page 2 CERTIFICATE OF CORRECTION Patent No. 3,832,'-l09 Dated August 27, 1975 i Inventor(s) Leland S. Endres, Leo F. Gehlhoff, Dallas D. Zimmerman It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2 line 8, add the following:

--l5. A polymer according to claim 1 wherein the B group in the aldehyde is hydrogen or a lower alkyl group containing from 1 to l carbon atoms.--

Signed and sealed this 13th day of March 1975.

(SEAL) Attest:

C. I'iARSHALL DANN RUTH C. MASON Commissioner of Patents Attesting Officer and Trademarks FORM Po-1o5o (10-69) USCOMM-DC 60376-P69 w 0.5 GOIIINIII" "minus orrlc: "CI o-au-ul, 

2. A condensation polymer of claim 1 of formaldehyde and 2-(2''-chloro-3''-perfluoroalkyl)-n-propylphenol wherein the perfluoroalkyl group is a monovalent radical containing from three to 20 carbon atoms.
 3. The polymer of claim 2 wherein the phenol is 2-(2''-chloro-3''-perfluorooctyl)-n-propylphenol.
 4. A polymer according to claim 1 wherein Q is a monochloro-substituted alkylene chain.
 5. A polymer according to claim 4 wherein Q is -CH2CHClCH2-.
 6. A polymer according to claim 5 wherein the phenol is 2-(2''-chloro-3''-perfluorooctyl)-n-propyl phenol.
 7. A polymer according to claim 1 wherein the phenol is 2-perfluorooctyl phenol.
 8. A polymer according to claim 5 wherein the phenol is an isomeric mixture of 3- and 5-chloro-2-(2''-chloro-3''-perfluorooctyl)-n-propyl phenol.
 9. A polymer according to claim 1 wherein Q is -CH2CH2CH2-.
 10. A polymer according to claim 1 wherein A is a benzene ring.
 11. A polymer according to claim 10 wherein the phenol has the formula
 12. A polymer according to claim 11 wherein Rf is a perfluorooctyl group.
 13. A polymer according to claim 1 wherein the aldehyde is formaldehyde.
 14. A condensation polymer having an average molecular weight of about 900 to about 2,500 of the condensation catalyst catalyzed reaction of a phenol of the formula 